CA2115793A1 - Integrated power and signal transmission system - Google Patents
Integrated power and signal transmission systemInfo
- Publication number
- CA2115793A1 CA2115793A1 CA002115793A CA2115793A CA2115793A1 CA 2115793 A1 CA2115793 A1 CA 2115793A1 CA 002115793 A CA002115793 A CA 002115793A CA 2115793 A CA2115793 A CA 2115793A CA 2115793 A1 CA2115793 A1 CA 2115793A1
- Authority
- CA
- Canada
- Prior art keywords
- signals
- unit
- operating
- transmission system
- signal transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5458—Monitor sensor; Alarm systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5475—Systems for power line communications adapted for drill or well combined with data transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5483—Systems for power line communications using coupling circuits
Abstract
Abstract An Integrated Power and Signal Transmission System A system is described which links by means of a pair of lines the command signals in square waveform from a unit broadcasting such command signals to an operating unit lying a long distance sway so that since the signals are sent at a low voltage of about 38V and a frequency of about 1kHz, they are enough after being stored in top quality capacitors to provide power to the operating point at said operating unit, without there being any need to stop power supply when signals are being sent, as used to happen in the previous system. Such system is particularly suitable for the transmitting of operating signals and the receiving of information from a wellhead.
Description
2~17~ -Integrated Power and Signal Transmission System, Technical Field This inventiDn is of a system to transmit pDwer and signals between tWD points distant frDm one another, one of them to command and the other to do or to operate whereby the same conductDr used to cDnvey power is used to convey the commands for the operating units and to receive answers and information from the Dperating point The inventiDn is alsD
a system which ma~es practically no difference between power and signals transmited from either of the two points that are apart.
More sPecifically, this invention can be emplDyed tD
control and monitor an undersea oil producing plant from a surface station.
~ac~ground Art One of the usual ways of controlling oil prDducing plant from the surface has been that of conveying both the power and the signals to Dperate moving parts (valves, retainers, flow diverters, etc.) along one same pair of wires while trYing as much as possible to avoid interference between p~wer and signal lines due to unwanted harmonics.
This practice, hDwever, has its drawbac~s, for instance:
a) since the undersea oil producing rigs are being laid in ever deeper waters, power-carrying cables have to travel long distances and therefore resistance becomes "", ~ "-,,,"",;-,,~ ,, ; "
~ - 2 -21t ;3793 greater, which means that relatively high voltages have to be employed (100 to 400V) and low frequencies (5~ to 60 Hz), which is not always desirable because high voltages lead to power lea~s along such undersea cables and connectorsj b) signals sent out are usually of low amplitude and high frequency (typical figures being a few mV up to 5V and 1 to 10 kHz) in order to avoid the appearance of harmonics in the power lines which would affect signals transmitted and make them difficult to read, and which would otherwise call for powerful and efficient filters to separate power from signals, which filters are expensive, bul~y and complex and therefore not always as reliable as might be wished The conveying of power and signal currents along the same pair of wires but at greatly different frequencies is known as frequency multiplexing.
There is another system that has been worked out whereby power is conveyed in the shape of square waves at typical figures, for instance, of 36V and 50Hz and signals are conveyed, for instance, at 3V and 1kHz, just one pair of conductors being used for both power and signals As mentioned, although the voltage applied is low compared with the usual method referred to before, and the square waves used to convey power being very efficient when resistance in the interconnecting cable is very high, this method suffers from the drawback that signal has to be sent when power is turned off, which i5 referred to as time multiplexing. And, since power must be off when signals are being sent then it !.'~ i ~ . . ' ~
21t ~` 7~ 3 must also be off when any answer comes in from the end operating point in reply to the starting point, This latter aspect has not yet been successfully overcome, Also, even though requirements are less it has not been possible to do away with filters, Disclosure of Invention The system of this invention as described herein has improvements that do away with many of the drawbacks of the former method, particularly because:
- it diminishes the causes of likely intereference without the use of filters;
- it Dperates with both power and signals being co,nveyed by the same conductor (regarded as a more suitable way in an improvement already referred to);
- square waves are employed, and;
- above all, power does not have to be separated from signals, there being therefore no need for power to be turned off when signals are being sent, The only obstacle that could not be overcome has been, as referred to before, the fact that power has to be off when operating point has to commun;cate with the starting point in order to send an answer to a question. It should be pointed out however that the designers of this system have resorted to the careful selection of a high quality capacitor in order to ensure that the energy stored thereby will be on tap for the operating point to use when its regular source of power is momentarily turned off at the remote initial comanding 211 ~793 point, An idea which i5 basic to the system invented as well as for later improvements thereof that may arise in the course of research, is that a low voltage current and at a frequency of about 1 kHz, able to carry a signal sent to the operating point, is enough energy to keep a capacitor continuously charged, that part thereof carrying the signal having been separated out, As referred to before, no difference is made between signals and power, and as has been said as well, there being no need to filter out the signal, Drief Description of Drawings The foregoing advantages as well as others will be se,en from the following description when read folIwed with the aid of the attached drawings: :
Figure 1 is a block diagram of the system as a whole and provides an overall view of how the various parts work together;
Figure 2 is a block diagram of modulator-demodulator assembly which modifies messages from units before and outside the system but which are vital in well operation control~
Figure 3 is a block diagram (also considerably simplified as in Figure 2) showing how the source suitably modulates signals before sending them out to the electrical distribution unit shown in one of the blocks of Figure 1 Figure 4 is a plan of a version (given as an example only) of the undersea part of the current system meant to :
211~7~
show how certain components in the diagram of Figure operate.
Figure 5 is a block diagram of the major unit (~PU
board) of the intelligent system that deals with data from various points of the system meant to be sent to the well to carry out the tas~s ordered which at the same time receives answers sent by the operating or measuring point for treatment and forwarding by the surface control unit. ::
~est Mode for Carrying Out the Invention In the bloc~ diagram of Figure 1 the parts that are not essential for this invention though they are part of information and control system of an undersea oil producing well, are shown within the broken line boxes representing the surface portion of the rig, The essential parts of the invention, whether considered individually or as part of an operating assembly, are named within the full line boxes. A
dotted line separates surface from undersea portions, Connecting lines between modem~modulating source and the electrical distribution component may cover a distance as great as the distance between the surface and the undersea units.
The "hydraulic power unit", "programmable controller", "interface" and "micro-computer" components are part of various contrDI assemblies. They should be referred to herein however so that those dealing therewith may be the better able to see how the system herewith invented wor~s, As is to be seen, such components are linked up in series by 2 ~
the signals sent out and manipulated so that such signals arrive at the "modem and modulated source" component ~which is here also referred to as the nsurface unit" because it encompasses the specific feature of this invention that lies in the surface portion of the system~ and from which they will become available to supply power and signals to the undersea components along lengthy cables and directly in communication with the "electric distribution unit" shown in Figure 1.
Thus the "modem and modulated source" receives the command signal from the micro-computer as well as the safety command to turn uff which serves to protect platform plant ~SD).
Figure ~ shows the modulator-demodulator component ~MODEM) of which, as can be seen, the most important central part is a GPU that receives communications on the various parameters, and in addition to its task of signalling referred to in the last block at the right, amplifies signals and sends them to the modulated source.
The blDck diagram in Figure 3 is a much simpler sketch of how signals from the MODEM are treated, how they are modulated by the "oscillator-modulator" unit and also how the no-break current from the platform is modulated, modulated signals therefrom being sent to the switcher which communicates with the undersea portion.
In the undersea portion signals (power and command signals sent from the surface) are received directly by the 21 ~ ~7~3 electric distribution unit and sent by i-t to the n subsea unit" which will be explained in detail in another though not ~-j limiting example in Figure 4.
Just one practical assembly is shown in Figure 4 one which can be easily installed and which is provided with the various features that can make installation of said subsea ur,it an easier task, It must be pointed out however that the following description is merely meant tD provide a better idea to those engaged in such kind of work, though this does not signify that the shapes and the arrangements shown should be regarded as the only ones.
In Figure 4 the arrangement set up is given the number 1, and consists of a framework on a single support, a practical kind of construction that makes it functional.
Supporting columns stand on a supporting base 13, to which they are fixed at some suitable point below the surface (not shown). Five boards 2, 3, 4, 5 and 6 overlie one another, with a space between one another, and are fastened at their corners. Also resting upon and suitably fastened to the base 13, there are three electrolytic capacitors 9, 10 and 11, Iying apart from one another. Likewise Iying upon said base 13, there are two transformers 8. The five boards 2, 3, 4, 5 and 6, shown overlying one another, are meant to bear electronic circuits the function whereof will be explained further on herein. The three capacitors 9, 10 and 11 operate in a given system but only capacitor 9, operates in the arrangement described herein, number 10 being a standby for 21~.37~3 - ~
number 9, The third capacitor 11, is meant to store up energy for the task of transmitting the pressure and temperature control signal ~DPTT), where employed. Also, of the two transformers 8, shown, only one operates, the other being its standby, The same applies tD the electric distribuition units, or sources 7, Iving upon board 3.
Wiring has been left out since it is not essentiai in understanding the invention, and also not to impede a proper view of components, since those engaged in this kind of work can easily understand where wiring should lie. 80ard 4 is the interface which may be used to bear the well temperature and pressure transmitter (DPTT), which if used is inserted ~into the sVstem. If this interface is used with the DPTT
signal transmitter the board will be connected to processing board 2, which carries the main electronics of the system.
If DPTT transmitter is not used, board 4 will be a blind board merely acting to shield the electronic assembly.
Below main electronics board 2 (also referred to herein as the GPU board) lies base board 3, meant to act as a reference point for electrical connections within arrangement 1, and as support for sources 7, as already mentioned, Since this board merely serves as a means of physically supporting connecting devices, there is no need to describe it in any detail.
50ard 5 which lies below base board 3, is a board that carries electronics as does board 2, and it is here referred to, just for the sake of distrinction, as the "redundant GPU
2 1 ~ 3 board", ~ oard 6 merely acts as a shield fcr the fDur boards Iying above it, to protect the capacitors: physicaJ and electrical distance apart.
As alreadv mentioned, electrical connections are made taking base board 3, as a reference point and intermediate means of support, while signals are sent out to the various parts controlled from the well by means of a matrix of diodes which controls traffic thereof Such matrix of diodes is sketched in merely as a block in Figure 1 However, as was found in the course of buiIding this system, the diodes that make up such matrix f diodes for communicating with the well head (see Figure 1~ if provided with stronger that usual capsules tfor instance, glass covered) need not lie within the protected housing of the device shown in Figure 4, referred to as the "undersea unitn, for they can even lie in an outside assembly under great pressure. This means that less space is taken up in assembling said "undersea unit" and that wiring becomes 5 impler.
In the system concerned it is expected to emplov input voltages of 36 to 100V, though in actual practice such figures are reasonably low, because: low voltage signals ~close to 36V) are usually enough for signal sent to be reasonably strong, and to become stronger at capacitors 9, 10 and 11 so that the operating of units governed by well head not be stopped when power is cut off because an answer has to ... . . ~.... .. . . .
2 ~ 3 be received from well head units (which used to happen in the previous of doing things); and al 50 because control signals sent from surface to undersea part is dDne on square waves and at frequencies close to 1 kHz (more precisely, 1070 Hz and 1270 Hz, which are the transmitting signales for "one"
and "zeron digital signals in the FSK system at 300 bps).
It should be noted that the modem in such instances, because its electronic arrangement covers treatment by a signal processing unit (see Figure 2) and does not just merely modulate and demodulate, becomes an intelligrnt unit In actual fact the modem also acts as a temporizer, so as to delay return communication concerning data requested from a we-ll head, and it also becomes a converter of protocol in order to provide instructions on how to operate well head devices, thereby acting as an interface between the end part of the system and the overall control computer, In addition to the features described above the modem acts as a means oF conveyance regardless of the actual system of control, for emergencV signals from platform and well, which travel freely, if required, giving out warning signals, As a matter of fact, owing to the treatment afforded to signals at various stages of the system in the surface portion thereof, as well as in the undersea portion, where there are processionig units (CPU), the system may be called a "distributed intelligence" system, which makes it a system able to deal with all control occurrences without any communication difficulty (see Figure 5~, - . . ", ~.: :.: . :
:: - .::: : . :
~ - :: , :-.,: . : ~ . : ~, 2~ ~ 3-7~
It can thus be seen that in view of the features described above, particularly as regards making communicatinn less complicated through use of simpler means, such as use of just one relatively low voltage and a quite specific high frequency, from which the command signal itself is picked, and by cutting the risk of breakdown because highly reliable components are chosen and used, chiefly the capacitors, the integrated system for the transmission of power and signals as described above has more advantages than the system previously employed, which ma~es it particularly useful in the remote control of an operating unit from a remote monitoring unit, particularly if said monitoring unit is on a processing platform and the unit controlled is a well in an oil field at the bottom of the sea consisting oF many wells It must also be understood that the embodiment described as an example is merely meant tr, provide a clearer understanding of the inventiDn, and is in no way limiting, limitations being expressed only in the claims made below .:: ' - ' : :
.
a system which ma~es practically no difference between power and signals transmited from either of the two points that are apart.
More sPecifically, this invention can be emplDyed tD
control and monitor an undersea oil producing plant from a surface station.
~ac~ground Art One of the usual ways of controlling oil prDducing plant from the surface has been that of conveying both the power and the signals to Dperate moving parts (valves, retainers, flow diverters, etc.) along one same pair of wires while trYing as much as possible to avoid interference between p~wer and signal lines due to unwanted harmonics.
This practice, hDwever, has its drawbac~s, for instance:
a) since the undersea oil producing rigs are being laid in ever deeper waters, power-carrying cables have to travel long distances and therefore resistance becomes "", ~ "-,,,"",;-,,~ ,, ; "
~ - 2 -21t ;3793 greater, which means that relatively high voltages have to be employed (100 to 400V) and low frequencies (5~ to 60 Hz), which is not always desirable because high voltages lead to power lea~s along such undersea cables and connectorsj b) signals sent out are usually of low amplitude and high frequency (typical figures being a few mV up to 5V and 1 to 10 kHz) in order to avoid the appearance of harmonics in the power lines which would affect signals transmitted and make them difficult to read, and which would otherwise call for powerful and efficient filters to separate power from signals, which filters are expensive, bul~y and complex and therefore not always as reliable as might be wished The conveying of power and signal currents along the same pair of wires but at greatly different frequencies is known as frequency multiplexing.
There is another system that has been worked out whereby power is conveyed in the shape of square waves at typical figures, for instance, of 36V and 50Hz and signals are conveyed, for instance, at 3V and 1kHz, just one pair of conductors being used for both power and signals As mentioned, although the voltage applied is low compared with the usual method referred to before, and the square waves used to convey power being very efficient when resistance in the interconnecting cable is very high, this method suffers from the drawback that signal has to be sent when power is turned off, which i5 referred to as time multiplexing. And, since power must be off when signals are being sent then it !.'~ i ~ . . ' ~
21t ~` 7~ 3 must also be off when any answer comes in from the end operating point in reply to the starting point, This latter aspect has not yet been successfully overcome, Also, even though requirements are less it has not been possible to do away with filters, Disclosure of Invention The system of this invention as described herein has improvements that do away with many of the drawbacks of the former method, particularly because:
- it diminishes the causes of likely intereference without the use of filters;
- it Dperates with both power and signals being co,nveyed by the same conductor (regarded as a more suitable way in an improvement already referred to);
- square waves are employed, and;
- above all, power does not have to be separated from signals, there being therefore no need for power to be turned off when signals are being sent, The only obstacle that could not be overcome has been, as referred to before, the fact that power has to be off when operating point has to commun;cate with the starting point in order to send an answer to a question. It should be pointed out however that the designers of this system have resorted to the careful selection of a high quality capacitor in order to ensure that the energy stored thereby will be on tap for the operating point to use when its regular source of power is momentarily turned off at the remote initial comanding 211 ~793 point, An idea which i5 basic to the system invented as well as for later improvements thereof that may arise in the course of research, is that a low voltage current and at a frequency of about 1 kHz, able to carry a signal sent to the operating point, is enough energy to keep a capacitor continuously charged, that part thereof carrying the signal having been separated out, As referred to before, no difference is made between signals and power, and as has been said as well, there being no need to filter out the signal, Drief Description of Drawings The foregoing advantages as well as others will be se,en from the following description when read folIwed with the aid of the attached drawings: :
Figure 1 is a block diagram of the system as a whole and provides an overall view of how the various parts work together;
Figure 2 is a block diagram of modulator-demodulator assembly which modifies messages from units before and outside the system but which are vital in well operation control~
Figure 3 is a block diagram (also considerably simplified as in Figure 2) showing how the source suitably modulates signals before sending them out to the electrical distribution unit shown in one of the blocks of Figure 1 Figure 4 is a plan of a version (given as an example only) of the undersea part of the current system meant to :
211~7~
show how certain components in the diagram of Figure operate.
Figure 5 is a block diagram of the major unit (~PU
board) of the intelligent system that deals with data from various points of the system meant to be sent to the well to carry out the tas~s ordered which at the same time receives answers sent by the operating or measuring point for treatment and forwarding by the surface control unit. ::
~est Mode for Carrying Out the Invention In the bloc~ diagram of Figure 1 the parts that are not essential for this invention though they are part of information and control system of an undersea oil producing well, are shown within the broken line boxes representing the surface portion of the rig, The essential parts of the invention, whether considered individually or as part of an operating assembly, are named within the full line boxes. A
dotted line separates surface from undersea portions, Connecting lines between modem~modulating source and the electrical distribution component may cover a distance as great as the distance between the surface and the undersea units.
The "hydraulic power unit", "programmable controller", "interface" and "micro-computer" components are part of various contrDI assemblies. They should be referred to herein however so that those dealing therewith may be the better able to see how the system herewith invented wor~s, As is to be seen, such components are linked up in series by 2 ~
the signals sent out and manipulated so that such signals arrive at the "modem and modulated source" component ~which is here also referred to as the nsurface unit" because it encompasses the specific feature of this invention that lies in the surface portion of the system~ and from which they will become available to supply power and signals to the undersea components along lengthy cables and directly in communication with the "electric distribution unit" shown in Figure 1.
Thus the "modem and modulated source" receives the command signal from the micro-computer as well as the safety command to turn uff which serves to protect platform plant ~SD).
Figure ~ shows the modulator-demodulator component ~MODEM) of which, as can be seen, the most important central part is a GPU that receives communications on the various parameters, and in addition to its task of signalling referred to in the last block at the right, amplifies signals and sends them to the modulated source.
The blDck diagram in Figure 3 is a much simpler sketch of how signals from the MODEM are treated, how they are modulated by the "oscillator-modulator" unit and also how the no-break current from the platform is modulated, modulated signals therefrom being sent to the switcher which communicates with the undersea portion.
In the undersea portion signals (power and command signals sent from the surface) are received directly by the 21 ~ ~7~3 electric distribution unit and sent by i-t to the n subsea unit" which will be explained in detail in another though not ~-j limiting example in Figure 4.
Just one practical assembly is shown in Figure 4 one which can be easily installed and which is provided with the various features that can make installation of said subsea ur,it an easier task, It must be pointed out however that the following description is merely meant tD provide a better idea to those engaged in such kind of work, though this does not signify that the shapes and the arrangements shown should be regarded as the only ones.
In Figure 4 the arrangement set up is given the number 1, and consists of a framework on a single support, a practical kind of construction that makes it functional.
Supporting columns stand on a supporting base 13, to which they are fixed at some suitable point below the surface (not shown). Five boards 2, 3, 4, 5 and 6 overlie one another, with a space between one another, and are fastened at their corners. Also resting upon and suitably fastened to the base 13, there are three electrolytic capacitors 9, 10 and 11, Iying apart from one another. Likewise Iying upon said base 13, there are two transformers 8. The five boards 2, 3, 4, 5 and 6, shown overlying one another, are meant to bear electronic circuits the function whereof will be explained further on herein. The three capacitors 9, 10 and 11 operate in a given system but only capacitor 9, operates in the arrangement described herein, number 10 being a standby for 21~.37~3 - ~
number 9, The third capacitor 11, is meant to store up energy for the task of transmitting the pressure and temperature control signal ~DPTT), where employed. Also, of the two transformers 8, shown, only one operates, the other being its standby, The same applies tD the electric distribuition units, or sources 7, Iving upon board 3.
Wiring has been left out since it is not essentiai in understanding the invention, and also not to impede a proper view of components, since those engaged in this kind of work can easily understand where wiring should lie. 80ard 4 is the interface which may be used to bear the well temperature and pressure transmitter (DPTT), which if used is inserted ~into the sVstem. If this interface is used with the DPTT
signal transmitter the board will be connected to processing board 2, which carries the main electronics of the system.
If DPTT transmitter is not used, board 4 will be a blind board merely acting to shield the electronic assembly.
Below main electronics board 2 (also referred to herein as the GPU board) lies base board 3, meant to act as a reference point for electrical connections within arrangement 1, and as support for sources 7, as already mentioned, Since this board merely serves as a means of physically supporting connecting devices, there is no need to describe it in any detail.
50ard 5 which lies below base board 3, is a board that carries electronics as does board 2, and it is here referred to, just for the sake of distrinction, as the "redundant GPU
2 1 ~ 3 board", ~ oard 6 merely acts as a shield fcr the fDur boards Iying above it, to protect the capacitors: physicaJ and electrical distance apart.
As alreadv mentioned, electrical connections are made taking base board 3, as a reference point and intermediate means of support, while signals are sent out to the various parts controlled from the well by means of a matrix of diodes which controls traffic thereof Such matrix of diodes is sketched in merely as a block in Figure 1 However, as was found in the course of buiIding this system, the diodes that make up such matrix f diodes for communicating with the well head (see Figure 1~ if provided with stronger that usual capsules tfor instance, glass covered) need not lie within the protected housing of the device shown in Figure 4, referred to as the "undersea unitn, for they can even lie in an outside assembly under great pressure. This means that less space is taken up in assembling said "undersea unit" and that wiring becomes 5 impler.
In the system concerned it is expected to emplov input voltages of 36 to 100V, though in actual practice such figures are reasonably low, because: low voltage signals ~close to 36V) are usually enough for signal sent to be reasonably strong, and to become stronger at capacitors 9, 10 and 11 so that the operating of units governed by well head not be stopped when power is cut off because an answer has to ... . . ~.... .. . . .
2 ~ 3 be received from well head units (which used to happen in the previous of doing things); and al 50 because control signals sent from surface to undersea part is dDne on square waves and at frequencies close to 1 kHz (more precisely, 1070 Hz and 1270 Hz, which are the transmitting signales for "one"
and "zeron digital signals in the FSK system at 300 bps).
It should be noted that the modem in such instances, because its electronic arrangement covers treatment by a signal processing unit (see Figure 2) and does not just merely modulate and demodulate, becomes an intelligrnt unit In actual fact the modem also acts as a temporizer, so as to delay return communication concerning data requested from a we-ll head, and it also becomes a converter of protocol in order to provide instructions on how to operate well head devices, thereby acting as an interface between the end part of the system and the overall control computer, In addition to the features described above the modem acts as a means oF conveyance regardless of the actual system of control, for emergencV signals from platform and well, which travel freely, if required, giving out warning signals, As a matter of fact, owing to the treatment afforded to signals at various stages of the system in the surface portion thereof, as well as in the undersea portion, where there are processionig units (CPU), the system may be called a "distributed intelligence" system, which makes it a system able to deal with all control occurrences without any communication difficulty (see Figure 5~, - . . ", ~.: :.: . :
:: - .::: : . :
~ - :: , :-.,: . : ~ . : ~, 2~ ~ 3-7~
It can thus be seen that in view of the features described above, particularly as regards making communicatinn less complicated through use of simpler means, such as use of just one relatively low voltage and a quite specific high frequency, from which the command signal itself is picked, and by cutting the risk of breakdown because highly reliable components are chosen and used, chiefly the capacitors, the integrated system for the transmission of power and signals as described above has more advantages than the system previously employed, which ma~es it particularly useful in the remote control of an operating unit from a remote monitoring unit, particularly if said monitoring unit is on a processing platform and the unit controlled is a well in an oil field at the bottom of the sea consisting oF many wells It must also be understood that the embodiment described as an example is merely meant tr, provide a clearer understanding of the inventiDn, and is in no way limiting, limitations being expressed only in the claims made below .:: ' - ' : :
.
Claims (5)
1. An integrated power and signal transmission system, installed to join a signal control and emission station consisting of a hydraulic power unit, a programmable controller and a microcomputer to a remote operating station that receives said controlling signals so that the signals sent out by the broadcasting station reach the points to be controled by the operating station and at the same time send information back to said broadcasting station, when necessary, characterized by said system consists of an electronic unit created by associating a modem with a modulated source which directly receives the signal broadcast by the broadcasting station and which then communicates with an electric distribution unit, which electric distribution unit is directly connected to an electronic unit (1) enclosed in a housing and containing:
a) boards (2, 3, 4, 5 and 6) with electronic components to manipulate said signals.
b) transformers (8), c) electric distribution units (7), d) capacitors (9, 10, 11) said electronic unit (1) being enclosed in a housing and sending out modified signals from the unit consisting of the modem and the modulated source to a matrix of diodes which distributes said signals to the operating points, signal sent out being only about 36V to about 100V and its frequency about 1 kHz, its waveform being square, from the broadcasting unit along a single pair of conductors, so as to provide power and signals to work the operating system.
a) boards (2, 3, 4, 5 and 6) with electronic components to manipulate said signals.
b) transformers (8), c) electric distribution units (7), d) capacitors (9, 10, 11) said electronic unit (1) being enclosed in a housing and sending out modified signals from the unit consisting of the modem and the modulated source to a matrix of diodes which distributes said signals to the operating points, signal sent out being only about 36V to about 100V and its frequency about 1 kHz, its waveform being square, from the broadcasting unit along a single pair of conductors, so as to provide power and signals to work the operating system.
2. An integrated power and signal transmission system as in claim 1, characterized by the signal sent out by the controlling unit to the operating unit is at a voltage of 38V
and a frequency of 1070 Hz and 1270 Hz.
and a frequency of 1070 Hz and 1270 Hz.
3. An integrated power and signal transmission system as in claims 1 and 2, characterized by the signal broadcasting unit lies on an offshore oil producing platform and the operating unit that receives said signals lies next to the operating assimbly or parameter reading unit which parameters are read at a wellhead lying at the bottom of the sea.
4. An integrated power and signal transmission system as in claim 1 characterized by said boards with their electronic components (2, 3, 4, 5 and 6) and arranged over one another and a given distance away from one another so as to avoid any physical contact among them.
5. An integrated power and signal transmission system as in claim 4, characterized by board (5) lies further down in the overlying arrangement and is a blind board used merely for shielding purposes, while board (4) lying above the arrangement may carry a circuit for the transmitting of pressure and temperature signals or be a blind board used merely for shielding purposes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI9300603 | 1993-02-17 | ||
| BR9300603A BR9300603A (en) | 1993-02-17 | 1993-02-17 | Integrated system for power and signal transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2115793A1 true CA2115793A1 (en) | 1994-08-18 |
Family
ID=4055867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002115793A Abandoned CA2115793A1 (en) | 1993-02-17 | 1994-02-16 | Integrated power and signal transmission system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5572182A (en) |
| EP (1) | EP0612161A3 (en) |
| BR (1) | BR9300603A (en) |
| CA (1) | CA2115793A1 (en) |
| EC (1) | ECSP941042A (en) |
| NO (1) | NO940534D0 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2300849B (en) * | 1995-08-11 | 1997-10-22 | Drucegrove Ltd | Communications system |
| US5975248A (en) * | 1995-08-11 | 1999-11-02 | Drucegrove Limited | Communications system |
| WO1999053627A1 (en) | 1998-04-10 | 1999-10-21 | Chrimar Systems, Inc. Doing Business As Cms Technologies | System for communicating with electronic equipment on a network |
| US6480510B1 (en) | 1998-07-28 | 2002-11-12 | Serconet Ltd. | Local area network of serial intelligent cells |
| US6473608B1 (en) * | 1999-01-12 | 2002-10-29 | Powerdsine Ltd. | Structure cabling system |
| US8593266B2 (en) * | 1999-07-01 | 2013-11-26 | Oilfield Equipment Development Center Limited | Power line communication system |
| US6956826B1 (en) | 1999-07-07 | 2005-10-18 | Serconet Ltd. | Local area network for distributing data communication, sensing and control signals |
| US6549616B1 (en) | 2000-03-20 | 2003-04-15 | Serconet Ltd. | Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets |
| US6842459B1 (en) | 2000-04-19 | 2005-01-11 | Serconet Ltd. | Network combining wired and non-wired segments |
| DE20115473U1 (en) * | 2001-09-19 | 2003-02-20 | Biester Klaus | Universal energy supply system |
| DE20115474U1 (en) | 2001-09-19 | 2003-02-20 | Biester Klaus | DC converter device |
| DE20018560U1 (en) * | 2000-10-30 | 2002-03-21 | Cameron Gmbh | Control and supply system |
| US7615893B2 (en) * | 2000-05-11 | 2009-11-10 | Cameron International Corporation | Electric control and supply system |
| DE20115471U1 (en) | 2001-09-19 | 2003-02-20 | Biester Klaus | Universal energy supply system |
| US6961303B1 (en) | 2000-09-21 | 2005-11-01 | Serconet Ltd. | Telephone communication system and method over local area network wiring |
| DE20115475U1 (en) * | 2001-09-19 | 2003-02-20 | Biester Klaus | DC converter device |
| US7020271B2 (en) * | 2003-06-12 | 2006-03-28 | Barbara Isabel Hummel | Ring control device |
| IL152824A (en) | 2002-11-13 | 2012-05-31 | Mosaid Technologies Inc | Addressable outlet and a network using same |
| IL159838A0 (en) | 2004-01-13 | 2004-06-20 | Yehuda Binder | Information device |
| US9683438B2 (en) | 2014-09-18 | 2017-06-20 | Baker Hughes Incorporation | Communication between downhole tools and a surface processor using a network |
| US11965409B2 (en) | 2022-03-28 | 2024-04-23 | Schlumberger Technology Corporation | Downhole device communication using measured electrical property of supplied power |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3900842A (en) * | 1973-03-29 | 1975-08-19 | Automated Technology Corp | Remote automatic meter reading and control system |
| US3938129A (en) * | 1974-08-21 | 1976-02-10 | General Electric Company | Power line data transmission system |
| GB1554411A (en) * | 1975-08-09 | 1979-10-17 | Communications Patents Ltd | Control systems |
| US4027286A (en) * | 1976-04-23 | 1977-05-31 | Trw Inc. | Multiplexed data monitoring system |
| US4157535A (en) * | 1977-05-20 | 1979-06-05 | Lynes, Inc. | Down hole pressure/temperature gage connect/disconnect method and apparatus |
| FR2557717B1 (en) * | 1983-12-30 | 1987-02-27 | Thomson Csf | TELE-POWER SUPPLY AND COMMAND TRANSMISSION DEVICE FOR A MOBILE STATION OF WIRELESS BEAMS |
| US4788448A (en) * | 1984-12-06 | 1988-11-29 | Ferranti Subsea Systems, Ltd. | Power transfer of direct current with inductive couplings |
| US4639714A (en) * | 1984-12-21 | 1987-01-27 | Ferranti Subsea Systems, Ltd. | Combined power and control signal transmission system |
-
1993
- 1993-02-17 BR BR9300603A patent/BR9300603A/en not_active IP Right Cessation
-
1994
- 1994-02-16 EP EP94301096A patent/EP0612161A3/en not_active Withdrawn
- 1994-02-16 NO NO940534A patent/NO940534D0/en unknown
- 1994-02-16 CA CA002115793A patent/CA2115793A1/en not_active Abandoned
- 1994-02-17 EC EC1994001042A patent/ECSP941042A/en unknown
- 1994-02-17 US US08/197,867 patent/US5572182A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0612161A3 (en) | 1995-07-26 |
| NO940534D0 (en) | 1994-02-16 |
| ECSP941042A (en) | 1994-09-16 |
| US5572182A (en) | 1996-11-05 |
| NO940534L (en) | 1994-08-18 |
| EP0612161A2 (en) | 1994-08-24 |
| BR9300603A (en) | 1994-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |